diff --git a/pkgs/development/beam-modules/erlang-ls/default.nix b/pkgs/development/beam-modules/erlang-ls/default.nix
index a0e3b142a0f..d35339ea0a8 100644
--- a/pkgs/development/beam-modules/erlang-ls/default.nix
+++ b/pkgs/development/beam-modules/erlang-ls/default.nix
@@ -11,6 +11,11 @@ let
       proper = super.proper.overrideAttrs (_: {
         configurePhase = "true";
       });
+      redbug = super.redbug.overrideAttrs (_: {
+        patchPhase = ''
+          substituteInPlace rebar.config --replace ", warnings_as_errors" ""
+          '';
+      });
     });
   };
 in